On 06/23/2020 09:01 AM, Guido van Rossum wrote:
Very nice! I am totally in favor (with some bike-shedding, of course).
First, a formatting comment:
A new sentence immediately following formatted code needs more space -- it
looks like the same sentence otherwise. Will putting two spaces after the
period help in this case?
Testing my understanding -- the following snippet from the PEP
match group_shapes():
case [], [point := Point(x, y), *other]:
will succeed if group_shapes() returns two lists, the first one being empty and
the second one starting with a Point() ?
---
Runtime Specifications
The __match__ protocol
---
Suffers from several indentation errors (the nested lists are not).
-------------------------------------------------------------------------
My biggest complaint is the use of
case _:
Unless I'm missing something, every other control flow statement in Python that can have an
"else" type branch uses "else" to denote it:
if/else
for/else
while/else
try/except/else
Since "else" perfectly sums up what's happening, why "case _" ?
match something:
case 0 | 1 | 2:
print("Small number")
case [] | [_]:
print("A short sequence")
case str() | bytes():
print("Something string-like")
else:
print("Something else")
--
~Ethan~
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